<%= render :partial => 'layouts/header' %>
<!--主体-->
<div id="main">
  <div id="content" class="float_right">
    <%= yield %>
  </div>
  <!--右侧widget-->
  <div id="widget" class="float_left">
    <%= render :partial => 'layouts/admin_tree' %>
  </div>
</div>
<%= render :partial => 'layouts/footer' %>
